The oxide portion of marine manganese nodules deserves intensive study because it probably reflects directly the conditions under which nodules form in the Bea. A better understanding of the nature of the oxides in nodules should therefore throw new light on basic problems of nodule origin.
From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
Supplement to: Sorem, Ronald K; Fewkes, Ronald H (1980): Distribution of Todorokite and Birnessite in manganese nodules from the "Horn Region", Eastern Pacific Ocean. in: Varentsov, I. M., Grasselly, G. (Eds.), Geology and Geochemistry of Manganese, E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 1, 201-229